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    Archive Number
    6514587
    Description
    Black and white aerial photograph of Trefor taken by the Ordnance Survey on 21st March 1973 at an altitude of 8000 feet. Grid reference SH3746. Print enlargement (c. 20") taken from 9" film roll.
    Collection Name
    Ordnance Survey Vertical Aerial Photography Collection
    Medium
    Photo.
    Originator
    Ordnance Survey
    Date
    1973-03-21